Reproducer for talking-machines



` W. KAUFMANN. REPHODUBEH Foa Humm MACHINES,

MPLICATION FILED AUGJZZ, |919.

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REPRODUCEH FORTALKING MACHINES. APPL|cAT|oN- msn Aus.22, 19:9.'

1,367,979; Patented Feb. As, '1921.

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REPRODUCER FOR TALKING MACHINES. APPLxcATloN FILED Aus.22,1919.

1,367,979, Pa-nm Feb. 8,1921.

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Ano'mfys Unirse status PATENT orFloE.

JOHN WILLIAlNI KAUFMANN, OF BALTIMORE, MARYLAND.

REPRODUCER FOB, TALKING-MACHINES.

Specification of Letters Patent.

Patented Feb. 8, 1921.

Applcationled August 22, 1919. Serial No. 319,152.

useful Improvements in Reproducers for Talking-Machines, of which thefollowing is a specification.

My invention relates to reproducers for talking machines and itcontemplates certain improvements in my Patent No. 1,354,197, datedSeptember 28, 1920.

It is a purpose of my invention to provide a reproducer in which theresilient member between the needle and the diaphragm is mounted tomaterially increase its responsiveness to the vibrations of the needleand to amplify such vibrations by allowing the use of resilient membersof greater rigidity. It is also a purpose of my invention to provide areproducer which can be used on records having vertical undulations aswell as those formed with horizontal undulations.

I will describe three forms of reproduoers embodying' my invention andwill then point out the novel features thereof in claims.

In the accompanying drawings:

Figure 1 is a perspective view'of one form of reproducer embodying myinvention showing the arm in active position upon a record.;

Fig. 2 is a view showing in front elevation the reproducer shown in Fig.1;

Fig. 3 is a vertical sectional view of the sound box shown in thepreceding views;

Figs. l and 5 are views showing in front and side elevation,respectively, another form of reproducer embodying my invention; Y Y pFigs. 6 and 7 are views vshowing in front and side elevation,respectively, still another form of reproducer embodying my' invention;

Figs. 8 and 9 are detail views showing certain parts of the reproducers.

Similar` reference characters referto similar parts ineach of theseveral views.

Referring specifically to the drawings and particularly to theembodiment shown in Figs. l to 3, inclusive, T designates a tone arm ofthe ordinary construction to which is connected in the usual manner asound box designated generally at S. As shown in Fig. 3, the sound box Sis of the ordinary construction, except it is provided with a diaphragm15, to one side of which is secured a disk 16, for distributing thevibrations of the diaphragm over a greater area and consequentlymaterially intensifying suoli vibrations. This effect is obtained bymaking the disk 16 of suoli a diameter that it will cover a majorportionof the surface of the diaphragm, and such disk being formed ofrigid material, it is obvious that4 when the diaphragm is set intovibration, the vibrations will not be concentrated about the axis of thediaphragm, as is the case in those of the ordinary construction. Thedisk 16 is secured to the diaphragm 15 by means of rivets 1dl whichextend through the disk and diaphragm and through an annulus 17 disposedupon the opposite side of the diaphragm and of a diameter correspondingto that of the disk. ing an annulus, the vibrations of the diaphragm arein no way restricted by this member', while, at the same time, it formsa securing means for the disk 16.

As shown in Fig. 3, L designates an actuating lever for the diaphragm15, and is formed at its lower end with an offset arm 18 which isthreaded and extends axially through the disk 16 and diaphragm 15. Thisarm 18 is secured to the disk in the usual manner.

The upper end of the actuating vlever L is rigidly connected to arockable frame designated generally at F, such frame being ofsubstantially rectangular formation and having the side portions thereofprovided with ears 19 for receiving a shaft 20. The shaft 20 isjournaled in brackets 21 which are secured to a supporting plate 22 bymeans of screws 23. In this manner the frame F is capable of rockingmovement about the shaft 20 as a center, and because the lever L isrigidly connected thereto, it will be obvious that when the frame isrocked a corresponding` movement `is imparted to By employmitting andintensifying the vibrations from a needle N to the actuating lever L,and, as shown in Figs. l'and 2, such member M comprises an elongatedsheet of resilient metal having an upper end 24 and a tapered lower end25. The upper end 24 of the member M is rigidly secured to the rockableframe F by arranging such portion as shown to advantage in dotted linesof Fig. 2. The lower end 25 of the member M extends through a suitablekopening formed in an arm 26 and has secured thereto a plate 27 uponwhich is fixed a clamp 28 for rigidly supporting the needle N. From thisarrangement it will be seen that the member M is formed to vibratelongitudinally and may swing about the shaft 2O as an axis. Thisarrangement is in contradistinction to that shown and described in thepending application above referred to, and the advantage of thisarrangement is to eliminate the pivotal supporting of the member at morethan one point, so that the vibrations of the needle N act directly uponthe member and without necessitating an actual bending of the member asin my pending application. As a result of this arrangement the member Mcan be made of stronger and thicker material, thus materially increasingthe intensity of the -vibrations transmitted by the needle N and, inturn, correspondingly increasing the vibrations of the diaphragm l5. Inthis way a better reproduction of the undulations in a record is securedboth as to volume and clearness of tone.

To prevent accidental striking of the member M during the ordinary useof the reproducer I utilize the'arm 26, the walls of the opening formedtherein restricting the lateral movement of the member M, as will bereadily understood. The arm 26-is secured to the supporting plate 22,and lies contiguous to a rib 22b formed on the lower end of the plate22.-

Referring now to Figs. 4 and 5, I have here 'shown a modification of thereproducer just described wherein the sound box S is arranged at theupper end of the supporting plate 222, while the actuating lever Lextends downwardly from the sound box and is connected to a frame Fpivotally mounted upon the supporting plate Vby means of a shaft 202. Itwill be obvious from the drawing that the manner of mounting the frame Fupon the supporting plate and the manner in which the actuating lever isconnected to the frame is identical to that shown in the first form ofmy invention. However, in the present embodiment, the resilient member Minstead of overlying the actuating lever L is a continuation of andextends below the actuating lever. The advantage of this arrangement isto permit the use of the reproducer on records in which the undulationsextend horizontally of the record, and wherein the reproducer generallyassumes the position shown in Fig. l. It is also a purpose to permit thereproducer to be used on records in which the undulations extendvertically of the records and wherein it isnecessary to arrange thereproducer in a position at right angles to that shown in Fig. l. Itwill, therefore, be seen that this form of reproducer is capable ofapplication to any form of tone arm and for reproducing the sound wavesVin records of both the Edison and Victor types.

Referring Vnow to Figs. 6 and 7, I have here shown a furthermodification in which the employment of a supporting plate is eliminatedand the frame F2 is supported upon a shaft 20", which latter isjournaled in brackets 21b secured directly to the sound box S2. In thisembodiment of my invention the actuating lever L2 extends along theouter side of the frame F2 and is pro vided on the confronting edge`thereof with notched extensions 29 and 29a between which is formed apivot ear 30, as shown in Fig. 8.

As illustrated to advantage in Fig. 7 the pivotear 30 receives theintermediate portion of the shaft 2Gb, while the extensions 29 and 292receive the upper and lower horizontal portions of the frame F2. In thismanner the actuating lever L2 is rigidly connected to the frame F2 andis pivoted for rocking movement upon the shaft 20", as will be readily.understood.

As shown in Fig. 6, the frame F2 carries a resilient member M2 which istapered from its Yupper end to its lower end and is provided centrallythereof with a slot "3l through which extends the actuating lever L2.The upper end of the member M2 is connected to the frame F2 in the samemanner as in the other forms of my invention, and the lower end of thismember is somewhat pointed, as shown in Fig. 7

Although I have herein described only three forms of reproducer showingmy invention, it is to beunderstood that various changes andmodifications may be made without departing from the spirit of theinvention `and the spirit and scope of the appended claims.

What I claim is:

1. A reproducer comprising a sound box including va diaphragm, arockable frame, an actuating lever connecting said frame and diaphragm,a resilient member secured to the frame and capable of swinging bodilywith said frame, and a needle carried by said member. Y

2. A reproducer comprising a sound box, a frame rockable upon the soundbox, a resilient member rigidly connected to said frame and having aslot formed therein,

and un actuating lever extending through said slot and connected to thediaphragm of said sound box.

3. reproducer comprising a sound box, an actuating lever mounted forvibratory movement thereof and connected to the diaphragm of the soundbox, a resilient member fulcrumed adjacent one of its ends only andhaving a rigid connection with said lever and a needle carried by themember.

l. A reproducer comprising a sound box, an actuating lever dependingfrom said sound box and connected to the diaphragm of the sound box, apivotally mounted frame rigidly connected to said lever, a resilientmember depending `from and rigidly. connected to said frame, and aneedle carried by the member.

5. A reproducer comprising, a sound box including a diaphragm, .a framerockably supported upon the sound box, an actuating lever connectingsaid frame and diaphragm, and a resilient member secured to the frameand slotted to accommodate said lever.

JOHN WILLIAM KAUFMANN.

liitnesses D. J. COLE,

JNO. A. NOLAN.

